Node.js MySQL Error Handling

Question

I\'ve read several examples for using mysql in node.js and I have questions about the error handling.

Most examples do error handling like this (perhaps for brevity)

Answer 1

This is a function to return available pool upon successful MySQL connection. So before I proceed with any query, I'll await this function to check whether connection is OK. This will not crash the server even if there's no connection to MySQL.

connect: function ()
    {
        return new Promise((resolve, reject) => {
            let pool = Mysql.createPool({
                connectionLimit: config.mysql.connectionLimit,
                host: config.mysql.host,
                user: config.mysql.user,
                password: config.mysql.password,
                database: config.mysql.database
            });

            pool.getConnection((err, con) =>
            {
                try
                {
                    if (con)
                    {
                        con.release();
                        resolve({"status":"success", "message":"MySQL connected.", "con":pool});
                    }
                }
                catch (err)
                {
                    reject({"status":"failed", "error":`MySQL error. ${err}`});
                }
                resolve({"status":"failed", "error":"Error connecting to MySQL."});
            });
        });
    }

MySQL package used: https://www.npmjs.com/package/mysql

Native Promise async/await ES2017